Official Go implementation of the Ethereum protocol
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go-ethereum/cmd/blsync/main.go

103 lines
2.9 KiB

// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"context"
"fmt"
"os"
"github.com/ethereum/go-ethereum/beacon/blsync"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/internal/flags"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/rpc"
"github.com/urfave/cli/v2"
)
func main() {
app := flags.NewApp("beacon light syncer tool")
app.Flags = flags.Merge([]cli.Flag{
utils.BeaconApiFlag,
utils.BeaconApiHeaderFlag,
utils.BeaconThresholdFlag,
utils.BeaconNoFilterFlag,
utils.BeaconConfigFlag,
utils.BeaconGenesisRootFlag,
utils.BeaconGenesisTimeFlag,
utils.BeaconCheckpointFlag,
//TODO datadir for optional permanent database
utils.MainnetFlag,
utils.SepoliaFlag,
utils.BlsyncApiFlag,
utils.BlsyncJWTSecretFlag,
},
debug.Flags,
)
app.Before = func(ctx *cli.Context) error {
flags.MigrateGlobalFlags(ctx)
return debug.Setup(ctx)
}
app.After = func(ctx *cli.Context) error {
debug.Exit()
return nil
}
app.Action = sync
if err := app.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func sync(ctx *cli.Context) error {
// set up blsync
client := blsync.NewClient(ctx)
client.SetEngineRPC(makeRPCClient(ctx))
client.Start()
// run until stopped
<-ctx.Done()
client.Stop()
return nil
}
func makeRPCClient(ctx *cli.Context) *rpc.Client {
if !ctx.IsSet(utils.BlsyncApiFlag.Name) {
log.Warn("No engine API target specified, performing a dry run")
return nil
}
if !ctx.IsSet(utils.BlsyncJWTSecretFlag.Name) {
utils.Fatalf("JWT secret parameter missing") //TODO use default if datadir is specified
}
engineApiUrl, jwtFileName := ctx.String(utils.BlsyncApiFlag.Name), ctx.String(utils.BlsyncJWTSecretFlag.Name)
var jwtSecret [32]byte
if jwt, err := node.ObtainJWTSecret(jwtFileName); err == nil {
copy(jwtSecret[:], jwt)
} else {
utils.Fatalf("Error loading or generating JWT secret: %v", err)
}
auth := node.NewJWTAuth(jwtSecret)
cl, err := rpc.DialOptions(context.Background(), engineApiUrl, rpc.WithHTTPAuth(auth))
if err != nil {
utils.Fatalf("Could not create RPC client: %v", err)
}
return cl
}